Machine for cutting punches and like master metal surfaces.



J. C. GRANT & L. A LEGROS. MACHINE FOR CUTTING PUNGHES AND LIKE MASTER METAL SURFACES.

APPLICATION FILED 001227, 1910.

1 030 399 Patented June25, 1912.

5 SHEETSSHEET 1.

Ira/wigs COLUMBIA PLANOGRAPH c0., WASHINGTON, D. c.

J. 0. GRANT & L. A. LEGROS. 4 MACHINE FOR CUTTING PUNGHBS AND LIKE MASTER METAL SURFACES}.

APPLICATION FILED 0GT.27, 1910.

Patented June 25, 1912.

5 SHEETS-SHEET 2.

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172 67252 T7272); 6, 67475 lzwzle f Zeyr %l a/MM E er @MM COLUMBIA PLANOGRAPH co wAsmNuToN, D. c.

Patented June 25, 1912.

' 5 SHEETS-SHEET 3.

M P emwu M Il 08 J M M a 1 m M5 0 mo [An/ A w H i: in ..w m. m H w J. 0) GRANT & L. A. LEGROS. MACHINE FOR CUTTING PUNGHBS AND LIKE MASTER METAL SURFACES.

APPLICATION FILED 0OT.2,'7 1910.

COLUMBIA PLANOGRAPH cm. wAsmNu'mN. n. c.

J. 0. GRANT & L. A. LEGROS. MACHINE .FOR CUTTING PUNGHES AND LIKE MASTER METAL SURFACES.

APPLICATION FILED 00T.27, 1910.

Patented June 25, 1912.

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COLUMBIA PLANOGRAPH co.,wAsHlNu'r0N, D. c

J. 0. GRANT & L. A. LEGROS. MACHINE FOR CUTTING PUNGHES AND LIKE MASTER METAL SURFACES.

APPLICATION FILED 001227, 1910. 1,030,399. Patented June 25, 1912.

5 SHEETS-SHEET 5.

1-1, I f I Egtna barren siaras Parser orrion JOHN CAMERON GRANT, OF KENSINGTON, ANE TJUCIEN ALPHONSE EEGROS, 0F WATFORD, ENGLAND.

MACHINE FOR CUTTING- PUNCHES AND LIKE MASTER METAL SURFACES.

Specification of Letters Patent.

Patented June 25, 1912.

Application filed October 27, 1910. Serial No. 589;;437.

To all whom it may concern:

Be it known that we, JoHN CAMERON GRANT, a subject of the King of Great Brit ain and Ireland, and residing at Albert Lodge, Albert Place, Kensington, in the county of London, England, and LUOIEN Anrnonsn Lnonos, a subject of the King of Great Britain and Ireland, and residing at Melbury, Clarendon Road, WVatford, in the county of Hertford, England, have invented certain new and useful Improvements in Machines for Cutting Punches and Like Master Metal Surfaces, of which the following is a specification.

This invention relates to punch cutting machines, and more particularly to the Benton WValdo machine for cutting type punches, and has for its object to provide means for holding the punch in the machine in such a manner as to facilitate examination, and for holding the former or model.

The invention consists in a method of holding the chuck in which the punch is carried in punch cutting machines upon the point, line and plane system.

The invention further consists in a chuck holding method on the above system in which the plane and line of contact are formed in the carrier slide and the point by a portion of a spherical surface attached to a micrometer screw supported on the slide.

Theinvention also consists in a method of forming the table of the machine in such manner that the posit-ion of the formers or models can be so determined as to produce the relief face of the punch in its correct position relatively to two. previously trued faces of the blank steel punch being operated upon.

The invention also consists in the provision of means for guiding the follower for removing parts of the periphery of the relief of the punch.

The invention also consists in the provision of means comprising a microscope and mirror carried on the machine, for examination of the punch while inplaoe on the machine.

The invention also consists in the improved means for holding the punch and former and for examining the punch hereinafter described.

Referring to the accompanying drawings,

' in which some parts are broken away or omitted; Figure 1 is a plan of the carrier slide and divided wheel. Fig. 2 is a front elevation of the carrier slide. Fig. 3 is a plan of the table with recessed bed for carrying and holding in place the formers or models. Fig. 4 is a longitudinal section of part of the table showing one of the visejaws. Fig. 5 is a cross-section of part of the table showing one of the vise-jaws. Fig. 6 is a vertical section of the chuck or punch holder. Fig. 7 is a cross-section of the chuck or punch-holder, in the line AA of Fig. 6. Fig. 8 is a front elevation of the retaining bolt. Fig. 9 is a plan of retaining bolt. Fig. 10 is a front elevation of divided wheel. Fig. 11 is a cross-section of divided wheel. Fig. 12 is a plan of the examining microscope and its carrying arm. Fig. 13 is a side elevation of part of the examining microscope and reflector. Fig. 14 is a front View of microscope lamp switch. Fig. 15 is a side elevation of a guide square for guiding the followers. Fig. 16 isa plan-of a guide square for guiding the followers. Fig. 17 is an elevation of a plinclrcutting machine embodying the invention; Fig. 18 is a section on the line BB of Fig. 17; Fig. 1 9 is a section on the line CC of Fig. 17.

In the machine illustrated (see particularly the Figs. 1, 2, 17, 18 and 19) the slide frame 1 is carried on vertically sliding heads a a sliding in guides in the main frame I) b of the machine. The frame of the machine is also provided with a slide carrying an ordinary watchmakers lathe head d. At the top of the frame of the machine there is fixed a top gimbal plate 6 in which is pivoted an outer gimbal ring 7. At right angles to the fixed axis of the gimbal ring f and in a plane passing through its axis there are placed the centers of an inner gimbal ring 9 to which the four guide rods 91, 92, 93 and 94 are fixed. These guide rods are a sliding fit in a lower outer gimbal ring it within which is a lower inner gimbal ring 76 which is pivoted to the slide head 2, the fixed axes of the two pairs of gimbal rings being parallel. The sliding head 2 is fitted with large flanges above and below the slide frame 1 which can be rigidly clamped at any desired height. The four guide rods are connected at their lower ends to the follower head Z to which is secured the follower stem m carrying the follower a which is guided by the former which forms the pattern for the punch.

The formers are secured as described below in a table 35 rigidly fixed to the main frame Z) of the machine. The central hole in the carrier slide 2 is bored to clear the chuck and is slotted with four slots receiving the packing slips 6, 7, 8, 9; of these the slip 6 has a vertical plane surface against which bears a corresponding flat surface on the chuck the slip 7 is formed with a plane surface and makes a vertical line contact with the cylindrical surface of the chuck; the slips 8 and 9 are fitted to act as guides for insuring the approximate positioning of the chuck. In the carrier slide Fig. 2 is formed a rectangular hole 11 in which slides the bolt 12, carrying the roller 13 and actuated by the spring 14 acting between the movable handle 15 and the fixed handle 16.

' The roller 13 bears on the lower face of the notch 17 in the chuck 10 Figs. 6 and 8 and causes its lower face to bear on the ball or point 18, Fig. 2 carried on the arm 19 fixed to the micrometer screw 20. The screw 20 is prevented from rotating by the guide pin 21, Fig. 1, which engages in a hole in the carrier slide 2. The micrometer screw 20 is elevated by rotating the internal screwed helical gear 22 which forms a nut. The helical gear 22 can be actuated by the helical wheel 23 fixed to the spindle 24 which rotates in the bearings 25 and 26 secured to the carrier slide 2. The divided wheel 27 can be secured in any desired position on the spindle 24 by means of the thumb screws 28 and 29 (Fig. 11) which permit of setting the divided wheel to correspond to the zero posit-ion of the face of the chuck 10. The fixed pointer 30, Fig. 1, is attached to the front of the carrier slide so as to aline with the divisions of the divided wheel 27. The carrier slide is formed in the usual manner with a lower plate 31 and securing nut 32 for permitting the whole to be assembled and the carrier plate 1 is formed with a recess 33 for clearing the bolt 11 and the handle 15. The fixed handle 16 is secured to the lower plate 31 and the handle 15 is pivoted to it by the pin 34. When the handles are gripped together the spring 14 is compressed and the bolt 12 with the roller 13 is withdrawn from the nick 17 in the chuck enabling the latter to be withdrawn from the carrier slide.

hen composite or accented characters are to be cut from two formers used simulta- 'neously, the supplementary vise-jaws 39 and 40 are employed to secure the second former in place. This is effected by lengthening the set packing 44 and holding the second former against the extended end of this packing and the main former by means of the supplementary vise-jaws 39 and 40. In cases when normal formers are used, the correct positioning of the former on the tableis obtained by the use of packings 42 and 44 respectively of appropriate dimensions for insuring that the punch shall be cut in its proper position in relation to the two previously trued faces of the steel blank which correspond to the sides of the model or former in contact with the packings 42 and 44 respectively. 1

The vise-jaws may be "c6iistructed as shown in the details Figs. 4 and 5 secured by screws 47 to guide blocks 48 fitted to the slide slots 49, 50, 51, 52 in the table, and fitted with nuts 53 in which work the screws 54, 55, 56, 57. For convenience in operating, the handle 58 of the screw 54 may be made removable and the screws 55 and 56 may be fitted with bevel wheels 59 and 60 which can be engaged respectively with corresponding wheels 61 and 62 on the spindle 63 and retained in gear by the latch 64.

The guide squares for use in milling the sides of the end of the punch blank may be constructed of the form shown in Figs. 15 and 16 in which 65 isia metal square arranged for clamping to the rods 45 or 46 by means of a clamping screw 66 or other suitable device such as a collar or pair of collars capable of being secured to the rods 45 or 46 and so limiting or preventing sideway movement of the squares; a plate 67 of celluloid or other suitable transparent material may be secured to the under side of the metal square 65 and may be ruled with lines at regular intervals for facilitating the setting of the square to project the correct amount beyond the limit of the character or figure on the model or former to insure the sides or periphery of the relief of the punch blank being milled to the proper dimensions.

Figs. 6 and 7 show a section of the chuck 10 having a plane face 68 prepared to bear against the vertical plane strip 6 of the carrier slide and having a notch 17 formed in it for'the bolt roller 13 to bear on. The chuck is preferably lined with trued metal blocks 69, 70, 71, and 72, against two of which the previously trued surfaces of the punch blank 7 5 are held by the screws 7 3 and 74. The upper end of the chuck may be internally screwed to receive the handle 76 for lifting and holding it when removed from the machine and this handle is preferably fitted with a micrometer screw 77 having a calibrated head 78 for setting the face of the punch blank for leveling with the face 7 9 of the chuck.

For examining the punch at any stage of the processof cutting, an examining microscope 80 :Fig. 12 is arranged to pivot on a vertical axis 81 carriedon one of the vertically sliding heads a of the machine. This microscope is fitted with :a mirror 83 carried on a light arm 84 and serving to reflect on to the face of the punch light obtained from a small electric lamp 85 carried on the microscope; a plug 86 carried by the microscope arm serves to make contact between contact pieces 87 and 88, Fig. 14, when the microscope is swung into place for examining and a stop screw 89 insures the correct positioning of the mirror in relation to the axis 81. To enable the whole surface of a large punch to be examined and-to give lateral adjustment to the mirror, a second vertical axis of adjustment 90 is provided. The microscope is so arranged as to swing clear of the guide rods 91, 92, 93, 94, of the punch-cutting machine when being swung into and out of position and is arranged at such height as to be conveniently placed for the operator to use without leaving a seated position at the machine.

The operation of the machine is as follows :-The former 41 is placed in position on the table 35 with its character in the correct position relatively to the two edges in contact with the packings 42, 44, these two edges corresponding with two previously trued faces on a punch blank on which the punch is to be cut. These punch blanks consist of pieces of steel which are cut ofi to a given length and ground perfectly true and square on the two adjacent sides. The punch blank is placed in position in the chuck in the manner above described and the character is gradually cut on its end by causing the follower a to trace the character on the former. The movement of the former causes the guides 91, 92, 93 and 94 to move the carrier slide 2 in such a position relatively to the rotating cutter carried by the lathe head (Z that the proper form of character is cut on the punch.

Having now described our invention what we claim as new and desire to secure by Letters Patent is 1. In a punch-cutting machine means for holding the punch blank comprising in combination a chuck, a plane surface on said chuck, a chuck-holder, a plane surface on said chuck-holder cooperating with said plane surface of said chuck, a plane surface on said chuck-holder adapted to make a line contact with said chuck and a spherical surface on said chuck-holder adapted to make a point contact with said chuck.

2. In a punch-cutting machine means for holding the punch blank comprismg in comblnation a chuck, two trued faces at right angles on-said chuck, .means for holding a punch in said chuck with two sides in con tact with said two faces at right angles, a plane surface on said chuck, a chuck-holder, a plane surface on said chuck-holder cooperating with said plane surface of said chuck, a plane surface on said chuck-holder adapted to make a line contact with said chuck and a spherical surface on said chuckholder adapted to make a point contact with said chuck.

3. In a punch-cutting machine means for holding the punch blank comprising in combination a chuck, a plane surface on said chuck, a chuck-holder, a plane surface on said chuck-holder cooperating with said plane surface of said chuck, a plane surface on said chuck-holder adapted to make a line I contact with said chuck, a spherical surface on said chuck-holder adapted to make a point contact with said chuck, and spring means for holding said chuck against said spherical surface.

4. In a punch-cutting machine means for holding the punch blank comprising in combination a chuck, a plane surface on said chuck, a chuck-holder, a plane surface on said chuck-holder cooperating with said plane surface of said chuck, a plane surface on said chuclcholder adapted to make a line contact with said chuck, a spherical surface on said chuck-holder adapted to make a point contact with said chuck, and a member carrying said spherical surface said member being adjustable in a line parallel to said line of contact.

5. In a punch-cutting machine means for holding the punch blank comprising in combination a cylindrical chuck, a flat on the curved surface of said chuck, a chuck-holder having a cylindrical aperture, a positioning piece having a plane surface in said chuckholder said plane surface cooperating with said flat 011 said chuck, a plane surface on said chuck-holder adapted to make a line contact with said chuck and a spherical surface on said chuck-holder adapted to make a point contact with said chuck.

6. In a punch-cutting machine in combination a punch-holding chuck having two trued plane surfaces at right angles, a chuckholder engaging with said chuck along a plane, a straight line and at a point, a table adapted to hold the former in position against two trued faces at right angles said two faces corresponding with said two trued faces of said chuck, as set forth.

7. In a punch-cutting machine in combination a punch-holding chuck having two trued surfaces at right angles, a chuckholder engaging with said chuck along a plane, a straight line and at a point and means for adjusting the position of said point, as set forth.

8. In a punch-cutting machine in combination a punch-holding chuck having two curately position the former with respect l0 truecl plane surfaces at right angles, a to two faces at right angles, as set forth. chuck-holder engaging with said chuck In testimony whereof, we aifix out signaalong a plane, a straight line and at a point, tures in presence of two witnesses.

a table for holding the former, a recess in JOHN CAMERON GRANT.

saicl table, an abutment strip in said recess LUCIEN ALPHONSE LEGROS. the face of said abutment strip being ac- Witnesses:

curately at right angles to one Wall of said BERTRAM H. MATTHEWS,

recess and set packing pieces adapted to ac- G. F. WARREN.

Copies of this patent may be obtained or five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

